I started playing this game but was sidetracked by MGS4 and COD4... gonna play it once I'm finished with those 2. I've played through 2 and three, might as well try the original. But honestly, repetitive enemies, and extremely repetitive level design, with boards stretching on forever, I find it really boring to trudge through. Halo 3's levels were nice and compact, with tons of setpieces, IMO that game has the best single player of the series by far.